CompTIA N10-009 Practice Test 24

Question 230

A network team addresses this situation: A switch trunk carries VLAN 10 but VLAN 40 hosts are isolated across two switches. After the corrective action, which test or result BEST verifies that the problem is resolved?

Check port VLAN and renew an office DHCP lease.
Capture VLAN 40-tagged frames and test same-VLAN host reachability.
Check root and blocked-port roles while monitoring broadcast rate.
Test denied guest connection and allowed finance session.

Explanation

Correct Answer

VLAN membership and 802.1Q tagging determine which Layer 2 broadcast domain carries each frame.

Incorrect Answers

Correct VLAN and subnet address confirm access membership. That check cannot demonstrate correct switch VLAN and trunk classification.

Stable topology and counters demonstrate loop suppression. That check cannot demonstrate correct switch VLAN and trunk classification.

Positive and negative paths confirm routed ACL effect. That check cannot demonstrate correct switch VLAN and trunk classification.

Question 231

A network specialist investigates this evidence: A switch trunk carries VLAN 10 but VLAN 40 hosts are isolated across two switches. Which underlying condition BEST explains the observed failure or requirement?

A Layer 2 loop exists without effective STP control.
Inter-VLAN routing lacks least-privilege filtering.
VLAN 40 is missing from the trunk's allowed tagged VLAN list.
The access port is in the wrong VLAN.

Explanation

Correct Answer

VLAN 40 is missing from the trunk's allowed tagged VLAN list. A tagged trunk must carry each intended VLAN consistently.

Incorrect Answers

A Layer 2 loop exists without effective STP control. The missing change involves vLAN 40 is missing from the trunk's allowed tagged VLAN list.

VLAN separation does not automatically restrict routed communication.

An untagged host inherits its access-port VLAN. The missing change involves vLAN 40 is missing from the trunk's allowed tagged VLAN list.

Question 232

A network team observes: A trunk links two vendors' switches and reports unexpected untagged management traffic in the wrong segment. What is the MOST appropriate corrective action or technical decision?

Enforce scoped routed ACLs blocking guest-to-payroll flows while permitting approved staff.
Restore spanning-tree protection and remove the accidental redundant loop.
Create and enable an SVI for VLAN 55 with gateway IP and routing enabled.
Align or eliminate untagged native VLAN use according to platform security policy.

Explanation

Correct Answer

An untagged frame is assigned according to the receiving native VLAN setting. Native vlan configuration differs between the trunk peers.

Incorrect Answers

Enforcing scoped routed ACLs blocking guest-to-payroll flows while permitting approved staff would not align or eliminate untagged native VLAN use according to platform security policy.

Restoring spanning-tree protection and removing the accidental redundant loop would not align or eliminate untagged native VLAN use according to platform security policy.

Creating and enabling an SVI for VLAN 55 with gateway IP and routing enabled would not align or eliminate untagged native VLAN use according to platform security policy.

Question 233

A network team addresses this situation: A trunk links two vendors' switches and reports unexpected untagged management traffic in the wrong segment. After the corrective action, which test or result BEST verifies that the problem is resolved?

Compare trunk native VLAN settings and test untagged control traffic.
Verify bundled-member state and traffic redistribution on link failure.
Check SVI operational state and ping it from VLAN clients.
Check root and blocked-port roles while monitoring broadcast rate.

Explanation

Correct Answer

Consistent classification confirms the mismatch is resolved.

Incorrect Answers

Verify bundled-member state and traffic redistribution on link failure. That check cannot demonstrate correct switch VLAN and trunk classification.

VLAN membership and 802.1Q tagging determine which Layer 2 broadcast domain carries each frame. Verification of this result involves comparing trunk native VLAN settings and test untagged control traffic.

Stable topology and counters demonstrate loop suppression. Verification of this result involves comparing trunk native VLAN settings and test untagged control traffic.

Question 234

A network specialist investigates this evidence: A trunk links two vendors' switches and reports unexpected untagged management traffic in the wrong segment. Which underlying condition BEST explains the observed failure or requirement?

The physical links have not been bundled into an agreed aggregation.
Native VLAN configuration differs between the trunk peers.
A Layer 2 loop exists without effective STP control.
Voice traffic is not separated and prioritized on the access path.

Explanation

Correct Answer

Native VLAN configuration differs between the trunk peers. An untagged frame is assigned according to the receiving native VLAN setting.

Incorrect Answers

LACP forms a logical link only when partner identities and member parameters agree. The missing change involves native VLAN configuration differs between the trunk peers.

A Layer 2 loop exists without effective STP control. The missing change involves native VLAN configuration differs between the trunk peers.

Voice traffic is not separated and prioritized on the access path.

Question 235

A network team observes: Phones and laptops share access ports; voice frames contend with bulk backups and call quality degrades. What is the MOST appropriate corrective action or technical decision?

Set compatible trunk modes and explicit allowed VLANs on both link ends.
Restore spanning-tree protection and remove the accidental redundant loop.
Configure the supported voice VLAN and QoS marking/trust boundaries.
Assign the port to the approved data VLAN and retain separate voice configuration.

Explanation

Correct Answer

Voice segments and priority treatment reduce competition from bulk data. Voice traffic is not separated and prioritized on the access path.

Incorrect Answers

Setting compatible trunk modes and explicit allowed VLANs on both link ends would not configure the supported voice VLAN and QoS marking/trust boundaries.

Restoring spanning-tree protection and removing the accidental redundant loop would not configure the supported voice VLAN and QoS marking/trust boundaries.

Assigning the port to the approved data VLAN and retaining separate voice configuration would not configure the supported voice VLAN and QoS marking/trust boundaries.

Question 236

A network team addresses this situation: Phones and laptops share access ports; voice frames contend with bulk backups and call quality degrades. After the corrective action, which test or result BEST verifies that the problem is resolved?

Inspect operational trunk state and validate tagged VLAN traffic.
Check root and blocked-port roles while monitoring broadcast rate.
Check port VLAN and renew an office DHCP lease.
Run a simultaneous call and transfer while measuring voice latency and jitter.

Explanation

Correct Answer

Traffic quality during contention validates voice policy.

Incorrect Answers

VLAN membership and 802.1Q tagging determine which Layer 2 broadcast domain carries each frame. That check cannot demonstrate the current HTTP endpoint and expected application response.

Stable topology and counters demonstrate loop suppression. That check cannot demonstrate the current HTTP endpoint and expected application response.

Correct VLAN and subnet address confirm access membership. That check cannot demonstrate the current HTTP endpoint and expected application response.

Question 237

A network specialist investigates this evidence: Phones and laptops share access ports; voice frames contend with bulk backups and call quality degrades. Which underlying condition BEST explains the observed failure or requirement?

Voice traffic is not separated and prioritized on the access path.
A Layer 2 loop exists without effective STP control.
Port-mode mismatch drops or misclassifies tagged traffic.
The access port is in the wrong VLAN.

Explanation

Correct Answer

Voice traffic is not separated and prioritized on the access path. Voice segments and priority treatment reduce competition from bulk data.

Incorrect Answers

A Layer 2 loop exists without effective STP control. That does not establish voice traffic is not separated and prioritized on the access path.

Port-mode mismatch drops or misclassifies tagged traffic. That does not establish voice traffic is not separated and prioritized on the access path.

An untagged host inherits its access-port VLAN. That does not establish voice traffic is not separated and prioritized on the access path.

Question 238

A network team observes: Hosts on VLAN 55 can reach each other but no gateway responds from their managed Layer 3 switch. What is the MOST appropriate corrective action or technical decision?

Configure compatible LACP port channels on both ends.
Create and enable an SVI for VLAN 55 with gateway IP and routing enabled.
Assign the port to the approved data VLAN and retain separate voice configuration.
Disable unused access ports and configure supported port security for required active jacks.

Explanation

Correct Answer

An SVI provides a Layer 3 interface for a switch VLAN. The vlan lacks an active switch virtual interface with the correct address.

Incorrect Answers

Configuring compatible LACP port channels on both ends would not create and enable an SVI for VLAN 55 with gateway IP and routing enabled.

Assigning the port to the approved data VLAN and retaining separate voice configuration would not create and enable an SVI for VLAN 55 with gateway IP and routing enabled.

Disable unused access ports and configure supported port security for required active jacks would not create and enable an SVI for VLAN 55 with gateway IP and routing enabled.

Question 239

A network team addresses this situation: Hosts on VLAN 55 can reach each other but no gateway responds from their managed Layer 3 switch. After the corrective action, which test or result BEST verifies that the problem is resolved?

Verify bundled-member state and traffic redistribution on link failure.
Check port VLAN and renew an office DHCP lease.
Check SVI operational state and ping it from VLAN clients.
Connect a test unauthorized MAC and observe the configured violation response.

Explanation

Correct Answer

VLAN membership and 802.1Q tagging determine which Layer 2 broadcast domain carries each frame. Verification of this result involves checking SVI operational state and ping it from VLAN clients.

Incorrect Answers

Verify bundled-member state and traffic redistribution on link failure. Verification of this result involves checking SVI operational state and ping it from VLAN clients.

Correct VLAN and subnet address confirm access membership. Verification of this result involves checking SVI operational state and ping it from VLAN clients.

Connect a test unauthorized MAC and observe the configured violation response. That check cannot demonstrate correct switch VLAN and trunk classification.

Question 240

A network specialist investigates this evidence: Hosts on VLAN 55 can reach each other but no gateway responds from their managed Layer 3 switch. Which underlying condition BEST explains the observed failure or requirement?

The physical links have not been bundled into an agreed aggregation.
The access port is in the wrong VLAN.
Bridge priorities do not designate the intended root.
The VLAN lacks an active switch virtual interface with the correct address.

Explanation

Correct Answer

The VLAN lacks an active switch virtual interface with the correct address. An SVI provides a Layer 3 interface for a switch VLAN.

Incorrect Answers

LACP forms a logical link only when partner identities and member parameters agree. The missing change involves the VLAN lacks an active switch virtual interface with the correct address.

An untagged host inherits its access-port VLAN. The missing change involves the VLAN lacks an active switch virtual interface with the correct address.

Bridge priorities do not designate the intended root. That does not establish correct switch VLAN and trunk classification.

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Pass Your CompTIA N10-009 Exam Easy!

Question 230

Explanation

Correct Answer

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Question 231

Explanation

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Question 232

Explanation

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Question 233

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Question 234

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Question 235

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Question 236

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Question 237

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Question 238

Explanation

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Question 239

Explanation

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Question 240

Explanation

Correct Answer

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CompTIA Network+ (N10-009) Practice Tests